MLA

Kagan, Paul, 1943-1993. Pamphlets, books, and broadsheets published by The Book Publishing Company at The Farm. Box 19, folder 321-323. 1974-76. https://collections.library.yale.edu/catalog/2025928.

APA, 6th edition

Kagan, Paul, 1943-1993. (["Box 19, folder 321-323"])(1974-76)[Pamphlets, books, and broadsheets published by The Book Publishing Company at The Farm]. https://collections.library.yale.edu/catalog/2025928.